— What time do you often do your homework?
— We do ________at 7:30 p. m.
A:my homeworks
B:our homework
C:our homeworks
D:my homework
如图,直线y=-43x+4与x轴、y轴分别交于A、B两点,把△AOB绕点A顺时针旋转90°后得到△AO'B',则点B'的坐标是( )
请通过计算回答: